Stability Assessment of Zoned Earth Dam under Water Particles Fluidity Effect: Hemren Dam as Case Study

Sammen, Saad Sh.; Majeed, Marwah Q.; Majeed, Qutaiba G.

doi:10.37934/arfmts.79.2.2738

Cited by 6 publications

(6 citation statements)

References 12 publications

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“…Sammen et al [13] studied numerical analysis of Hemren dam that is located in Iraq (Diyala governorate) by using twodimensional finite element method GEO STUDIO, excited earthquake is Elcentro while three values of peak ground acceleration were used which are 0.2, 0.25 and 0.3 g and the duration time is scaled to 10 seconds.…”

Section: Literature Reviewmentioning

confidence: 99%

Physical Modeling of Seismic Response of Makhool Dam Subjected to the Halabja Earthquake

Ali,

Al-Shukur

2024

MMEP

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Earth dam can be considered as the most ancient type of embankment dam that can be constructed with natural materials such as natural soils, rocks, clay and gravel. Zone earthfill dam is typically composed of two main parts: central core and shell that is filled with gravel and rock to strengthen the stability of the whole body of dam. Many reasons can cause the failure of an earth dam including hydraulic failure, structural failure and seepage failure. Earthquake failure can be considered as a structural failure, therefore, it is important to study the dynamic response of earth dam during the earthquake. This paper presents a seismic analysis on zone-earth dam subjected to earthquake excitation by using a shaking table with dimensions (170×150) cm, on which maximum acceleration, pore-water pressure, and displacement were calculated. The Makhool dam is considered as a case study that is located on Tigris River in Iraq with total length 3670 m. The physical model was simulated using a scale of 1:400 that fit the dimensions of the container (100×50×60) cm and subjected the model to the Halabja earthquake, with a magnitude of 7.3 (Richter scale) according to the Iraq Meteorological Organization and Seismology. Three values of earthquake (0.04 g, 0.06 g, and 0.08 g) were used with a time of 10 seconds, and the parameters were calculated on two nodes on the physical model. Pore-water pressure increases with an increase in the value of the earthquake and is larger at the dam base than the dam crest. Additionally, the displacement can be increased, which weakens the dam soil and affects the stability of the dam. The value of x-acceleration will be reduced at the end of the earthquake, which means the input acceleration affects soil properties.

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Section: Literature Reviewmentioning

confidence: 99%

Physical Modeling of Seismic Response of Makhool Dam Subjected to the Halabja Earthquake

Ali,

Al-Shukur

2024

MMEP

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“…Horizontal drainage blanket). This section was also relied upon by previous researchers [3,4]. This study differs from the rest of the research.…”

Section: Introductionmentioning

confidence: 99%

“…Hemrin Dam, which serves as the case study, is situated in the steep Hemrin mountain range and is thought to be the current active seismic line, it is imperative to research the direct and indirect effects of earthquakes on Hemrin Dam. Studied [3] Analysis Seismic Response and Stability of the Slope of the Hemrin Dam in the Governorate of Diyala. Used the Geo-Studio program to examine the Hemrin Dam and determine the factor of safety.…”

Section: Introductionmentioning

confidence: 99%

Effect of Using Vertical Drainage Column in Hemrin Dam on Factor of Safety Under Seismic Load

Abdalhassan,

Jalut

2023

E3S Web Conf.

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Recent years have seen an increase in the use of computer-based numerical models to test the stability of earth dams and to simulate the impact of all the factors that affect their safety. Geo-Studio software and its sub-programs SLOPE/W, and QUAKE/W are used to determine the factors of safety and stability of dams, and investigations of dynamic analysis, a finite element serves as its base to do the numerical modeling for this study. The Hemrin Dam represents the case study and is regarded as the study's major focus. The results showed that the values of the safety factor increased from (1.439) to (1.583) when the water level is 8m, from (1.365) to (1.549) when the water level is 16 m, and from (1.084) to (1.317) maximum water level is 32m, without and with a vertical drainage column, because the pore water pressure is reduced and the effective stress is increased. In the case of a Rapid drawdown of water when a vertical drainage column is added, the value of the factor of safety decreases from 1.371 to 1.306 for the initial time, while decreasing from 1.406 to 1.363 for the second day of rapid drawdown. These reductions result from there is a delay between the process of the reservoirs' water level dropping and the water level lowering on the earthen dam's side. The vertical drainage column is crucial for the stability of the dam as the water is drained using the existing vertical and horizontal filters which eventually improve and increase the value of the effective stress.

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“…Ahmad et al [28] applied the FEM method to estimate the stability analysis of the earthen dam by SEEP/W on a studied case of Latamber Dam in Pakistan. Sammen et al [29] used the GeoStudio package to prepare the flow and seismic stability analysis on the Hemren earth-fill dam, which led to the variation charts for the presentation of rapid drawdown under seismic loading conditions.…”

Section: Introductionmentioning

confidence: 99%

Coupled Numerical and Analytical Stability Analysis Charts for an Earth-Fill Dam under Rapid Drawdown Conditions

et al. 2022

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The presented article provides a comprehensive study on the stability analysis of earth-fill dams under rapid drawdown and transient flow conditions used to prepare stability analysis charts by conducting coupled finite-element numerical and analytical limit equilibrium procedures. In this regard, the impacts of different rapid drawdown conditions on the safety factor of the Alavian earth-fill dam are determined. The slope stability charts present for both shallow and deep slip surfaces with various permeabilities are verified by ground information obtained with extensive instrumentation on the dam’s site. The results showed that by decreasing the permeability of the core’s material, despite preventing seepage, the instability risk of the upstream slope as a result of rapid drawdown intensifies. Also, as stability charts can be stated, with increasing the slip surface’s depth and decreasing the hydraulic hydration, the reliability decreases, and the sliding surfaces’ sensitivity increases based on the drawdown rates, which have been revealed to be from 0.2 to 0.6, the most critical state for safety factors, showing significant declines.

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Stability Assessment of Zoned Earth Dam under Water Particles Fluidity Effect: Hemren Dam as Case Study

Cited by 6 publications

References 12 publications

Physical Modeling of Seismic Response of Makhool Dam Subjected to the Halabja Earthquake

Physical Modeling of Seismic Response of Makhool Dam Subjected to the Halabja Earthquake

Effect of Using Vertical Drainage Column in Hemrin Dam on Factor of Safety Under Seismic Load

Coupled Numerical and Analytical Stability Analysis Charts for an Earth-Fill Dam under Rapid Drawdown Conditions

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